systemctl: hide first column with --plain instead of --no-legend

Hiding the first column, which may contain bullet circles, with --no-legend
is undocumented and potentially unexpected. On the other hand, not printing
bullet circles with --plain is documented so hiding the column with that
switch is sensible.

The combination "--full --no-legend --no-pager --plain" is appropriate for
automated processing of systemctl output.

shell-completion/bash/systemctl.in

@@ -7,7 +7,7 @@
 
 __systemctl() {
     local mode=$1; shift 1
-    systemctl $mode --full --no-legend --no-pager "$@" 2>/dev/null
+    systemctl $mode --full --no-legend --no-pager --plain "$@" 2>/dev/null
 }
 
 __systemd_properties() {

shell-completion/bash/systemd-analyze

@@ -31,7 +31,7 @@ __get_machines() {
 }
 
 __get_services() {
-    systemctl list-units --no-legend --no-pager -t service --all $1 | \
+    systemctl list-units --no-legend --no-pager --plain -t service --all $1 | \
         { while read -r a b c; do [[ $b == "loaded" ]]; echo " $a"; done }
 }
 

shell-completion/bash/systemd-cgls

@@ -29,7 +29,7 @@ __get_machines() {
 }
 
 __get_units_have_cgroup() {
-    systemctl $1 list-units | {
+    systemctl $1 --full --no-legend --no-pager --plain list-units | {
         while read -r a b c d; do
             [[ $c == "active" && ${a##*.} =~ (service|socket|mount|swap|slice|scope) ]] && echo " $a"
         done

shell-completion/bash/systemd-nspawn

@@ -30,7 +30,7 @@ __get_users() {
 
 __get_slices() {
     local a b
-    systemctl list-units -t slice --no-legend --no-pager | { while read a b; do echo " $a"; done; };
+    systemctl list-units -t slice --no-legend --no-pager --plain | { while read a b; do echo " $a"; done; };
 }
 
 __get_machines() {

shell-completion/bash/systemd-run

@@ -18,7 +18,7 @@
 
 __systemctl() {
     local mode=$1; shift 1
-    systemctl $mode --full --no-legend "$@"
+    systemctl $mode --full --no-legend --no-pager --plain "$@"
 }
 
 __get_slice_units () { __systemctl $1 list-units --all -t slice \

shell-completion/bash/udevadm

@@ -38,7 +38,7 @@ __get_all_devs() {
 }
 
 __get_all_device_units() {
-    systemctl list-units -t device --full --no-legend --no-pager 2>/dev/null | \
+    systemctl list-units -t device --full --no-legend --no-pager --plain 2>/dev/null | \
         { while read -r a b; do echo "$a"; done; }
 }